Properties:Input: DC 4.5 V-7 V (input voltage to output voltage must be greater than 1 V or more.)Output: 3.3 V, 800mA (charging current must not exceed 800ma)Specially designed two-pin mounting holes, can be attached directly to the expansion card hole for experiments;Input Output Using 2 P single row socket for easy connection;PCB board size: 2.5 cm * 1.1 cmWith power LED (red)